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Effect of electromagnetic stirring on metallurgical quality of GCr15 electroslag ingot

China Foundry 2022年第1期19卷 46-54页

作者： Xiao-fang Shi Tao Xu Li-zhong Chang School of Metallurgy Engineering Anhui University of TechnologyMa'anshan 243002AnhuiChina Anhui Fukai Special Material Co. Ltd.Jixi 245300AnhuiChina

To further improve the metallurgical quality of electroslag remelting,remove the large inclusions in electroslag ingot and refine the solidification structure of electroslag ingot,an electroslag remelting furnace with electromagnetic stirring was designed,and the influence of different magnetic induction intensities on metallurgical quality of GCr15 electroslag ingot was *** with different sizes and types were analyzed by an ASPEX scanning electron microscope,and the morphology and composition of inclusions were further observed by a JSM-6510LV scanning electron *** distribution of alloying elements on the cross section of electroslag ingot was analyzed by original position analysis(OPA).The results show that whether or not electromagnetic stirring is used,the inclusions in electroslag ingot are mainly composed of Al_(2)O_(3),MnS,MnS-oxide and other oxides,among which Al_(2)O_(3) is the *** with an electroslag ingot without electromagnetic stirring,the number of inclusions decreases considerably,and the proportion of small inclusions increases while the proportion of large inclusions decreases when the electromagnetic stirring with remelting current of 1.1 kA and magnetic induction intensity of 62 Gs is ***,excessive electromagnetic force will cause the number and diameter of inclusions to increase *** stirring has different effects on the segregation of different *** the experimental conditions,the weak electromagnetic force with 1.1 kA and magnetic induction intensity of 108 Gs has little effect on the segregation of C,but decreases the segregation of P,and the excessive electromagnetic force aggravates the segregation of alloy elements.

关键词： electroslag remelting electromagnetic stirring inclusion solidification segregation GCr15 bearing steel

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Light-, Middle- and Heavy-Lanthanide Ate-Complexes Bearing Ln(Ⅲ)-Si bonds: Structural, Spectroscopic, and Bonding Analysis

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Chinese Journal of Chemistry 2023年第22期41卷 2995-3002,I0002页

作者： Xiaowei Pan Changjiang Wu Huayi fang Chunhua Yan School of Materials Science and Engineering Tianjin Key Lab for Rare Earth Materials and ApplicationsNankai University Tianjin300350China Shanghai Zhitong Construction Engineering Technology Co. Ltd.Shanghai 204433China College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhouGansu 730000China

Recent decades have witnessed a rapid development of the lanthanide silicon *** this research,by reacting[(THF)_(3)LisiPh_(3)]with Cp_(3)Ln(Ⅰ)(THF)(Ln(I)=Sm(Ⅰ),Tb(Ⅱ),Dy(Ⅰ),Yb(Ⅰ)or Cp_(2)Lu(Ⅱ)CI(THF),a series of middle-and heavy-lanthanocene monosilyl/disilyl ate-complexes([(DME)_(3)Lil[Cp_(3)Ln(Ⅱ)SiPh_(3)]and[(DME)_(3)Li[Cp_(2)Lu(Ⅱ)(SiPh_(3))_(2)])were *** structures of the obtained lanthanocene monosilyl/disilyl ate-complexes were determined by single crystal X-ray *** with the previously reported[(DME)_(3)Li[Cp_(3)La(Ⅱ)SiPh_(3)]and[(DME);Lil[Cp_(3)Ce(Ⅱ)SiPha],a complex group comprising silyl light-,middle-and heavy-lanthanocene with identical core coordination pattern are presented.

关键词： Lanthanide ate-complex Silyl ligand Lanthanide-silicon bond Structure elucidation Density functional calculations Metallocenes

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Practice and Challenge of International Peer Review: A Case Study of Research Evaluation of CAS Centers for Excellence

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Journal of Data and Information Science 2019年第3期4卷 22-34页

作者： fang Xu Xiaoxuan Li Institutes of Science and Development Chinese Academy of Sciences Beijing 100090 China School of Public Policy and Management University of Chinese Academy of Sciences Beijing 100049 China

Purpose: The main goal of this paper is to show that international peer review can work in China’s context with satisfactory outcomes. Moreover, this paper also provides a reference for the practice of science and technology ***/methodology/approach: This paper starts with a discussion of two critical questions about the significance and design of international peer review. A case study of international peer review of CAS Centers for Excellence is further analyzed. Findings: International peer review may provide a solution to address the problem of quantitative oriented research evaluation in China. The case study of research evaluation of CAS Centers for Excellence shows that it is possible and feasible to conduct an international peer review in China’s context. When applying this approach to other scenarios, there are still many issues to consider including individualized design of international peer review combined with practical demands, and further improvement of theories and methods of international peer review. Research limitation: 1) Only the case of international peer review of CAS Centers for Excellence is analyzed;2) A relatively small number of respondents were surveyed in the questionnaire. Practical implications: The work presented in this study can be used as a reference for future ***/value: Currently, there are no similarly detailed studies exploring the significance and methodology of international peer review in China.

关键词： Chinese Academy of Sciences CAS Centers for Excellence International peer review Research evaluation

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二氧化锆掺入对三维打印的硅酸二钙支架物理化学和生物学性能的影响（英文）

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无机材料学报 2019年第4期34卷 444-454页

作者：傅声扬俞斌丁惠锋石国栋朱钰方上海理工大学材料科学与工程学院上海200093 复旦大学上海医学院上海市公共卫生临床中心骨科上海200032 上海市浦东医院复旦大学附属浦东医院 201399

三维打印结合高分子前躯体制备生物陶瓷材料由于制备工艺简单,在骨组织工程修复领域引起了极大的关注。本文成功利用三维打印技术与高分子硅胶前躯体结合,通过填充活性Ca CO3和惰性ZrO_2制备出ZrO_2掺杂的β-Ca_2SiO_4支架。制备得到的... 详细信息

三维打印结合高分子前躯体制备生物陶瓷材料由于制备工艺简单,在骨组织工程修复领域引起了极大的关注。本文成功利用三维打印技术与高分子硅胶前躯体结合,通过填充活性Ca CO3和惰性ZrO_2制备出ZrO_2掺杂的β-Ca_2SiO_4支架。制备得到的支架具有均一、连通的大孔结构(孔隙率>67%),随着掺杂ZrO_2含量的增加,支架的抗压强度明显提高,并且促进成骨细胞增殖、分化。重要的是在动物体内实验发现,相较于纯的β-Ca_2SiO_4支架, ZrO_2的掺入明显提高了支架在骨缺损处促进新骨形成的能力。因而,通过三维打印结合高分子前躯体技术制备掺杂ZrO_2的β-Ca_2SiO_4支架有望应用于骨组织工程。

关键词： β-Ca2SiO4 ZrO2 聚合物前驱三维打印骨组织工程

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不同牙体预备方法对预备体质量及牙体修复效果的影响

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中国医药指南 2025年第1期23卷 25-27页

作者：陈呈蔡巧玲张洁黄芳厦门大学附属第一医院口腔科福建厦门361001 复旦大学附属中山医院厦门医院口腔科福建厦门361001

目的分析不同牙体预备方式对预备体质量及口腔修复治疗临床效果的影响。方法选取2021年1月至2022年1月厦门大学附属第一医院口腔科收治的牙体缺损患者190例,将93例接受常规视野下牙体预备患者归入常规组,将97例在2.5倍放大镜下进行牙体... 详细信息

目的分析不同牙体预备方式对预备体质量及口腔修复治疗临床效果的影响。方法选取2021年1月至2022年1月厦门大学附属第一医院口腔科收治的牙体缺损患者190例,将93例接受常规视野下牙体预备患者归入常规组,将97例在2.5倍放大镜下进行牙体预备的患者归入放大镜组。比较在不同牙体预备方式下预备体质量、修复效果。结果放大镜组肩台预备评分、倒凹、表面光滑度得分均低于常规组(P<0.05)。放大镜组的美国公共卫生署(USPHS)修复效果评价得分低于常规组(P<0.05)。结论与常规视野下牙体预备方式相比,放大镜下牙体预备能获得更理想的牙体预备质量,对后续修复体制作有益,并获得更好的边缘密合性,减少牙龈炎症,对远期修复效果有积极作用。

关键词：牙体预备放大镜常规视野预备质量评分

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On single particle breakage behavior of crushable weathered sands

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Journal of Mountain Science 2022年第12期19卷 3627-3644页

作者： YU fang-wei ZHAO Chuang LIU Wei-chen Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610299China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China China-Pakistan Joint Research Centeron Earth Sciences Islamabad 45320Pakistan Department of Civil Engineering The University of TokyoTokyo 113-8656Japan Department of Civil Engineering Zhejiang UniversityHangzhou 310058China

This paper presents an experimental study on single particle breakage behavior of crushable weathered sands by a number of single particle uniaxial compression tests to comprehensively investigate the characteristics of single particle breakage,the probability of survival of single particle,and the effects of particle size and weathering on single particle *** behavior of single particle under uniaxial compression falls into the mixed five phases:damage by chipping,elastic deformation,fragmentation by partial fracture,breakage by splitting,and the residuals,demonstrating the complexity and variability of the tensile strengths of single *** behavior of single particle breakage was quantified herein by the initial fracture and failure strengths of single *** probability of survival decreased as the characteristic stresses *** increase in the particle size or weathering number of single particle resulted in a reduction in the probability of survival of single *** a given probability of survival,the difference in the initial fracture characteristic stress and failure characteristic stress decreased with increasing particle size but showed a complex change with increasing weathering *** probability of survival showed greater variability for the normalized initial fracture characteristic stress than for the normalized failure characteristic stress,implying that the initial fracture stresses of single particles diverged more than the failure stresses of the *** average initial fracture and failure characteristic stresses,and the initial fracture and failure characteristic stresses corresponding to 1/e(37%)survival of single particles decreased while increasing particle size or weathering number,but the decrease showed a sharper rate for smaller single particles with a lower weathering *** ln-ln coordinates showed a linear representation of the failure characteristic stress and particle size,verifying th

关键词： Breakage Compression Particle size Probability of survival Sands Weathering

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A new diagnosis strategy under the PMC model and applications

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High Technology Letters 2020年第1期26卷 34-43页

作者： Liang Jiarong Chen fang Zhang Qian School of Computer and Electronic Information Guangxi UniversityNanning 530004P.R.China Guangxi Key Laboratory of Multimedia Communications and Network Technology Nanning 530004P.R.China

A new diagnosis method, called Double-Syndrome diagnostic, is proposed, which can identify faulty nodes by comparing 2 different syndromes. For the same system, the average number of faulty nodes identified correctly by the Double-Syndrome diagnostic is much greater than the t-diagnosability and the(t_1/t_1)-diagnosability of the system. Furthermore, in order to identify the remaining faulty nodes in the system, two strategies of fault diagnostic are proposed, one is called(k, t)-fault diagnosable strategy, another is called(k, t/t)-fault diagnosable strategy. Besides, the conditional(k, t)-diagnosable((k, t/t)-diagnosable) system is introduced. Furthermore, the conditional diagnosabilities are proved for some regular(k, t)-diagnosable and(k, t/t)-diagnosable networks such as n-dimensional hypercube network and n-dimensional star network. And then, for a system, its(k,t)-conditional diagnosability and its(k, t/t)-conditional diagnosability are identical, and in the worst case, they are equal to their traditional conditional diagnosability.

关键词： Double-Syndrome diagnostic (k,t)-diagnosable (k,t/t)-diagnosable hypercube 2D(3D)mesh permutation star graph

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电厂辅机变频调速系统的滑模自适应鲁棒控制

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热力发电 2020年第4期49卷 138-143页

作者：董芳董煜西安热工研究院有限公司陕西西安710054 神华国能集团有限公司神头第二发电厂山西朔州036018

针对电厂辅机(风机和泵类)电机变频调速控制系统非线性、响应慢、扰动大等问题,提出辅机变频调速系统的滑模自适应鲁棒控制(SMARC)方法,利用SMARC能够实时逼近系统输入系数的特性,将系统模型误差、外界干扰造成的系统内部参数变化等问... 详细信息

针对电厂辅机(风机和泵类)电机变频调速控制系统非线性、响应慢、扰动大等问题,提出辅机变频调速系统的滑模自适应鲁棒控制(SMARC)方法,利用SMARC能够实时逼近系统输入系数的特性,将系统模型误差、外界干扰造成的系统内部参数变化等问题减小到最小范围,通过滑模控制消除电机变频调速转速跟踪误差,实现电机对给定运行转速的高精度跟踪。对某燃气轮机辅机开式水系统SMARC进行仿真和实际应用,结果表明:在变频调速电机启动瞬间和达到稳定转速后,正常运行过程中突加转矩,SMARC具有较强的转速跟踪能力,抗负载扰动比传统的PID控制更具优势,且超调量小;在电机启动过程中,SMARC误差仅为1.75%;现场实际应用也证明本文方法有效可行。

关键词：辅机电机变频调速 SMARC 控制方法控制效果跟踪

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Calls of the Large Odorous Frog(Odorrana graminea)Show Nonlinear and Individual Characteristics

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Asian Herpetological Research 2021年第1期12卷 124-134页

作者： fang ZHANG Yatao WU Jinmei WANG Jiahui BAO College of Life Sciences Azhui Normal UniversityWuhu 241000AnhuiChina Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources Wuhu 24100OAnlhuiChina

Male large odorous frogs(Odorrana graminea)have been shown to have a rich vocal repertoire and their calls contain harmonics that extend into the ultrasonic range,much like calls of male ***,a sympatric *** vocalizations of male *** exhibit nonlinear characteristics and contain individual signatures,it is unclear whether or not those of *** *** carried out an extensive study of the vocalizations of male *** with the goal of investigating whether they:(1)contained nonlinear phenomena(NLP),(2)carried individual *** recorded and analyzed 1770 vocal calls from nine *** calls were classifiable into two distinct categories(one-note calls and multi-note calls).Of these,one-note complex/steep-frequency modulation call was the most abundant *** calls showed diverse frequency modulation patterns,and abundant presence of *** basic spectral and temporal pa ra meters of such calls were individually ***-Wallis Analysis of Rank test showed that the calls from individual males differed *** discriminant function analysis(DFA)showed that 54.7%of the calls could be correctly assigned to *** results suggested that male *** might be able to discriminate neighboring frogs from strangers ***,further research is necessary to demonstrate this capacity behaviorally.

关键词： Anurans call-type individual signatures nonlinear phenomena sound communication

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c-CSN:Single-cell RNA Sequencing Data Analysis by Conditional Cell-specific Network

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Genomics, Proteomics & Bioinformatics 2021年第2期19卷 319-329页

作者： Lin Li Hao Dai Zhaoyuan fang Luonan Chen Key Laboratory of Systems Biology Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China Shanghai Research Center for Brain Science and Brain-Inspired Intelligence Shanghai 201210China CAS Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming 650223China Hangzhou Institute for Advanced Study Chinese Academy of SciencesHangzhou 310024China

t The rapid advancement of single-cell technologies has shed new light on the complex mechanisms of cellular ***,compared to bulk RNA sequencing(RNA-seq),single-cell RNA-seq(scRNA-seq)suffers from higher noise and lower coverage,which brings new computational *** on statistical independence,cell-specific network(CSN)is able to quantify the overall associations between genes for each cell,yet suffering from a problem of overestimation related to indirect *** overcome this problem,we propose the c-CSN method,which can construct the conditional cell-specific network(CCSN)for each cell.c-CSN method can measure the direct associations between genes by eliminating the indirect associations.c-CSN can be used for cell clustering and dimension reduction on a network basis of single ***,each CCSN can be viewed as the transformation from less“reliable”gene expression to more“reliable”gene–gene associations in a *** on CCSN,we further design network flow entropy(NFE)to estimate the differentiation potency of a single cell.A number of scRNA-seq datasets were used to demonstrate the advantages of our approach.1)One direct association network is generated for one cell.2)Most existing scRNA-seq methods designed for gene expression matrices are also applicable to c-CSN-transformed degree matrices.3)CCSN-based NFE helps resolving the direction of differentiation trajectories by quantifying the potency of each cell.c-CSN is publicly available at https://***/LinLi-0909/c-CSN.

关键词： Network flow entropy Cell-specific network Single-cell network Direct association Conditional independence

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